<!DOCTYPE html>
<meta charset="utf-8">
<style>

  .node {
    cursor: pointer;
  }

  .node circle {
    fill: #fff;
    stroke: steelblue;
    stroke-width: 1.5px;
  }

  .node text {
    font: 10px sans-serif;
  }

  .link {
    fill: none;
    stroke: #ccc;
    stroke-width: 1.5px;
  }

</style>
<body>
<script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script>
<script>
  var root = {
    "name": "flare",
    "deal": "2",
    "children": [{
      "name": "analytics" ,
      "children": [{
        "name": "cluster",
        "children": [{
          "name": "AgglomerativeCluster",
          "size": 3938
        }, {
          "name": "CommunityStructure",
          "size": 3812
        }, {
          "name": "HierarchicalCluster",
          "size": 6714
        }, {
          "name": "MergeEdge",
          "size": 743
        }]
      }]
    }, {
      "name": "ISchedulable",
      "deal": "2",
      "size": 1041
    }, {
      "name": "Parallel",
      "size": 5176
    }, {
      "name": "Pause",
      "size": 449
    }
    ]
  };
  var margin = {top: 20, right: 120, bottom: 20, left: 120},
          width = 1024 - margin.right - margin.left,
          height = 798 - margin.top - margin.bottom;

  var i = 0,
          duration = 750,
          root;

  var tree = d3.layout.tree().nodeSize([90, 60]);

  var diagonal = d3.svg.diagonal()
          .projection(function(d) { return [d.x, d.y]; });

  /*
  var svg = d3.select("body").append("svg")
      .attr("width", width + margin.right + margin.left)
      .attr("height", height + margin.top + margin.bottom)
    .append("g")
      .attr("transform", "translate(" + margin.left + "," + margin.top + ")");
  */

  //Redraw for zoom
  function redraw() {
    //console.log("here", d3.event.translate, d3.event.scale);
    svg.attr("transform", "translate(" + d3.event.translate + ")" + " scale(" + d3.event.scale + ")");
  }

  var svg = d3.select("body").append("svg")

      .attr('width', "60vw")
      .attr('height', "60vh")
          .call(zm = d3.behavior.zoom().scaleExtent([1,3]).on("zoom", redraw)).append("g")
          .attr("transform", "translate(" + 512 + "," + 50 + ")");

  //necessary so that zoom knows where to zoom and unzoom from
  zm.translate([512, 50]);

  //d3.json("flare.json", function(error, flare)
  //  if (error) throw error;
  {
    root.x0 = 0;
    root.y0 = height / 2;
    console.log(1,root)

    function collapse(d) {
      if (d.children) {
        d._children = d.children;
        d._children.forEach(collapse);
        d.children = null;
      }
    }

    root.children.forEach(collapse);
    update(root);
  }

  d3.select(self.frameElement).style("height", "800px");

  function update(source) {

    // Compute the new tree layout.
    var nodes = tree.nodes(root).reverse(),
            links = tree.links(nodes);

    debugger;
    // Normalize for fixed-depth.
    nodes.forEach(function(d) { d.y = d.depth * 180; });

    // Update the nodes…
    var node = svg.selectAll("g.node")
            .data(nodes, function(d) { return d.id || (d.id = ++i); });

    // Enter any new nodes at the parent's previous position.
    var nodeEnter = node.enter().append("g")
            .attr("class", "node")
            .attr("transform", function(d) { return "translate(" + source.x0 + "," + source.y0 + ")"; })
            .on("click", click);

    nodeEnter.append("circle")
            .attr("r", 1e-6)
            .style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });

    nodeEnter.append("text")
            .attr("x", function(d) { return d.children || d._children ? -10 : 10; })
            .attr("dy", ".35em")
            .attr("text-anchor", function(d) { return d.children || d._children ? "end" : "start"; })
            .text(function(d) { return d.name; })
            .style("fill-opacity", 1e-6);

    // Transition nodes to their new position.
    var nodeUpdate = node.transition()
            .duration(duration)
            .attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; });

    nodeUpdate.select("circle")
            .attr("r", 20)
            .style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });

    nodeUpdate.select("text")
            .style("fill-opacity", 1);

    // Transition exiting nodes to the parent's new position.
    var nodeExit = node.exit().transition()
            .duration(duration)
            .attr("transform", function(d) { return "translate(" + source.x + "," + source.y + ")"; })
            .remove();

    nodeExit.select("circle")
            .attr("r", 1e-6);

    nodeExit.select("text")
            .style("fill-opacity", 1e-6);

    // Update the links…
    var link = svg.selectAll("path.link")
            .data(links, function(d) { return d.target.id; });

    // Enter any new links at the parent's previous position.
    link.enter().insert("path", "g")
            .attr("class", "link")
            .attr("d", function(d) {
              var o = {x: source.x0, y: source.y0};
              return diagonal({source: o, target: o});
            });

    // Transition links to their new position.
    link.transition()
            .duration(duration)
            .attr("d", diagonal);

    // Transition exiting nodes to the parent's new position.
    link.exit().transition()
            .duration(duration)
            .attr("d", function(d) {
              var o = {x: source.x, y: source.y};
              return diagonal({source: o, target: o});
            })
            .remove();

    // Stash the old positions for transition.
    nodes.forEach(function(d) {
      d.x0 = d.x;
      d.y0 = d.y;
    });
  }

  // Toggle children on click.
  function click(d) {
    if (d.children) {
      d._children = d.children;
      d.children = null;
    } else {
      d.children = d._children;
      d._children = null;
    }
    update(d);
  }

</script>